feat: adding kurl installer object lint capabilities

[ricardomaraschini]

What this PR does / why we need it:

This PR introduces a single source of truth for Installer object validations. It provides a set of rego rules and a complete list of Add-Ons and respective supported versions, all centralised in rego policies and variables.

Which issue(s) this PR fixes:

Fixes #60178

Special notes for your reviewer:

Pay special attention to the regotests directory as it contains inputs (on installer: property) and outputs (on the output property). In essence, given installer we expect to se output errors.

Does this PR introduce a user-facing change?

NONE

Does this PR require documentation?

NONE